Zhao yazhi _ AndroidUI_listview's item sliding deletion effect, listview sliding Deletion

Zhao yazhi _ AndroidUI_listview's item sliding deletion effect, listview sliding Deletion

Package com. example. listsildedel; import java. util. arrayList; import java. util. list; import android. app. activity; import android. content. intent; import android. OS. bundle; import android. widget. listView; public class MainActivity extends Activity {private ListView mListView; @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); mListView = (ListView) this. findViewById (R. id. list); List <String> list = new ArrayList <String> (); for (int I = 0; I <10; I ++) {list. add ("option" + I);} // instantiate the custom content adapter class MyAdapter adapter = new MyAdapter (this, this, list); // set the listView adaptation to mListView. setAdapter (adapter);} public void openActivity () {Intent intent = new Intent (this, TestActivity. class); startActivity (intent );}}

Adapter

Package com. example. listsildedel; import java. util. list; import android. content. context; import android. view. layoutInflater; import android. view. motionEvent; import android. view. view; import android. view. view. onClickListener; import android. view. view. onTouchListener; import android. view. viewGroup; import android. widget. baseAdapter; import android. widget. button; import android. widget. textView; public class MyAd Apter extends BaseAdapter {private List <String> arrays = null; private Context mContext; private Button curDel_btn; private float x, ux; private MainActivity mActivity; public MyAdapter (MainActivity activity, Context mContext, list <String> arrays) {this. mContext = mContext; this. arrays = arrays; mActivity = activity;} public int getCount () {return this. arrays. size ();} public Object getItem (int Position) {return null;} public long getItemId (int position) {return position;} public View getView (final int position, View view, ViewGroup arg2) {ViewHolder viewHolder = null; if (view = null) {viewHolder = new ViewHolder (); view = LayoutInflater. from (mContext ). inflate (R. layout. item, null); viewHolder. tvTitle = (TextView) view. findViewById (R. id. title); viewHolder. btnDel = (Button) view. f IndViewById (R. id. del); view. setTag (viewHolder);} else {viewHolder = (ViewHolder) view. getTag () ;}// replaced the onItemClick <span style = "font-size: 18px;"> <strong> view. setOnClickListener (new OnClickListener () {public void onClick (View v) {// TODO Auto-generated method stub mActivity. openActivity () ;}}); </strong> </span> // set the touch listener view for each view item. setOnTouchListener (new OnTouchListener () {public Boolean onTouch (View v, MotionEvent event) {final ViewHolder holder = (ViewHolder) v. getTag (); // process if (event. getAction () = MotionEvent. ACTION_DOWN) {// set the background to the selected status // v. setBackgroundResource (R. drawable. mm_listitem_pressed); // obtain the x axis coordinate x = event. getX (); // determine whether the delete button exists. if so, hide if (curDel_btn! = Null) {if (curDel_btn.getVisibility () = View. VISIBLE) {curDel_btn.setVisibility (View. GONE); return true ;}} else if (event. getAction () = MotionEvent. ACTION_UP) {// release processing // set the background to unselected normal status // v. setBackgroundResource (R. drawable. mm_listitem_simple); // obtain the x coordinate ux = event when releasing. getX (); // if (holder. btnDel! = Null) {// when the difference between pressing and releasing the absolute value is greater than 20, the delete button is displayed; otherwise, if (Math. abs (x-ux)> 20) {holder. btnDel. setVisibility (View. VISIBLE); curDel_btn = holder. btnDel; return true ;}} else if (event. getAction () = MotionEvent. ACTION_MOVE) {// return true if the background is selected when sliding; // v. setBackgroundResource (R. drawable. mm_listitem_pressed);} else {// other mode // set the background to unselected normal status // v. setBackgroundResource (R. drawable. mm_listitem_simple);} return fal Se ;}}); viewHolder. tvTitle. setText (this. arrays. get (position); // Add a listener event for the delete button to delete the viewHolder when you click the delete button. btnDel. setOnClickListener (new OnClickListener () {public void onClick (View v) {if (curDel_btn! = Null) curDel_btn.setVisibility (View. GONE); arrays. remove (position); policydatasetchanged () ;}}); return view ;}final static class ViewHolder {TextView tvTitle; Button btnDel ;}}